syzkaller login: [ 38.866367] BUG: Bad rss-counter state mm:00000000a14e913d type:MM_FILEPAGES val:33 [ 38.867601] BUG: Bad rss-counter state mm:00000000a14e913d type:MM_ANONPAGES val:22 [ 38.910412] ================================================================== [ 38.911501] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.912386] Read of size 8 at addr ffff88801692e3f8 by task sshd/226 [ 38.913270] [ 38.913551] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.914417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.915351] Call Trace: [ 38.915652] [ 38.915934] dump_stack_lvl+0x91/0xf0 [ 38.916398] print_report+0xcc/0x620 [ 38.916852] ? __virt_addr_valid+0x102/0x340 [ 38.917374] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917953] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918537] kasan_report+0xbe/0xf0 [ 38.918989] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919584] vma_interval_tree_remove+0xc75/0xec0 [ 38.920164] vma_prepare+0xc54/0x11a0 [ 38.920623] __split_vma+0x5af/0x950 [ 38.921076] ? __pfx___split_vma+0x10/0x10 [ 38.921588] ? find_held_lock+0x2c/0x110 [ 38.922112] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.922676] ? lock_is_held_type+0x9f/0x120 [ 38.923225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.923846] ? mtree_range_walk+0x632/0x900 [ 38.924398] ? mas_walk+0x5c7/0x7c0 [ 38.924879] do_vmi_munmap+0x1f1/0x2b0 [ 38.925366] mmap_region+0x1f9/0x2660 [ 38.925841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.926351] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.927052] ? __pfx_lock_acquire+0x10/0x10 [ 38.927581] ? __pfx_mmap_region+0x10/0x10 [ 38.928118] ? security_mmap_addr+0x7d/0xa0 [ 38.928640] ? get_unmapped_area+0x1f5/0x3f0 [ 38.929188] do_mmap+0x854/0xf00 [ 38.929634] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.930121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.930685] ksys_mmap_pgoff+0x3af/0x500 [ 38.931189] do_syscall_64+0x3f/0x90 [ 38.931683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932322] RIP: 0033:0x7f2c34e38d82 [ 38.932767] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.934903] RSP: 002b:00007fff156bc408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.935812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c34e38d82 [ 38.936673] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c34272000 [ 38.937557] RBP: 00007f2c34272000 R08: 0000000000000009 R09: 0000000000001000 [ 38.938417] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652a6519ec0 [ 38.939281] R13: 00007fff156bc420 R14: 00007fff156bc450 R15: 00007fff156bc7b0 [ 38.940149] [ 38.940442] [ 38.940660] Allocated by task 219: [ 38.941099] kasan_save_stack+0x22/0x50 [ 38.941591] kasan_set_track+0x25/0x30 [ 38.942082] __kasan_slab_alloc+0x59/0x70 [ 38.942604] kmem_cache_alloc+0x16b/0x370 [ 38.943126] vm_area_dup+0x20/0x160 [ 38.943607] __split_vma+0x170/0x950 [ 38.944078] split_vma+0xc6/0x110 [ 38.944512] mprotect_fixup+0x8d2/0xb30 [ 38.945042] do_mprotect_pkey+0x87e/0xd40 [ 38.945582] __x64_sys_mprotect+0x78/0xc0 [ 38.946139] do_syscall_64+0x3f/0x90 [ 38.946657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.947358] [ 38.947593] Freed by task 219: [ 38.948020] kasan_save_stack+0x22/0x50 [ 38.948546] kasan_set_track+0x25/0x30 [ 38.949060] kasan_save_free_info+0x2b/0x50 [ 38.949592] __kasan_slab_free+0x10a/0x190 [ 38.950134] kmem_cache_free+0x10d/0x4d0 [ 38.950649] rcu_core+0x8c8/0x2860 [ 38.951097] __do_softirq+0x1b7/0x7d4 [ 38.951595] [ 38.951813] Last potentially related work creation: [ 38.952402] kasan_save_stack+0x22/0x50 [ 38.952915] __kasan_record_aux_stack+0x8e/0xa0 [ 38.953495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.954155] remove_vma+0x139/0x170 [ 38.954605] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.955220] do_vmi_munmap+0x1f1/0x2b0 [ 38.955727] __vm_munmap+0x138/0x3a0 [ 38.956203] __x64_sys_munmap+0x59/0x80 [ 38.956695] do_syscall_64+0x3f/0x90 [ 38.957166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.957810] [ 38.958034] The buggy address belongs to the object at ffff88801692e3a0 [ 38.958034] which belongs to the cache vm_area_struct of size 168 [ 38.959534] The buggy address is located 88 bytes inside of [ 38.959534] freed 168-byte region [ffff88801692e3a0, ffff88801692e448) [ 38.960962] [ 38.961184] The buggy address belongs to the physical page: [ 38.961855] page:00000000ea75b62f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1692e [ 38.962966] memcg:ffff88800ee8a201 [ 38.963406] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.964055] page_type: 0xffffffff() [ 38.964511] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.965415] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee8a201 [ 38.966336] page dumped because: kasan: bad access detected [ 38.967002] [ 38.967214] Memory state around the buggy address: [ 38.967803] ffff88801692e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.968669] ffff88801692e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.969545] >ffff88801692e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.970408] ^ [ 38.971279] ffff88801692e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.972154] ffff88801692e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.973012] ================================================================== [ 38.973977] Disabling lock debugging due to kernel taint [ 42.009543] BUG: Bad rss-counter state mm:000000001720f88f type:MM_FILEPAGES val:33 [ 42.010710] BUG: Bad rss-counter state mm:000000001720f88f type:MM_ANONPAGES val:22 [ 42.425866] BUG: Bad rss-counter state mm:0000000089e86c58 type:MM_FILEPAGES val:33 [ 42.427134] BUG: Bad rss-counter state mm:0000000089e86c58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40900' (ECDSA) to the list of known hosts. 2023/06/20 16:16:08 fuzzer started 2023/06/20 16:16:08 dialing manager at localhost:36067 2023/06/20 16:16:08 checking machine... 2023/06/20 16:16:08 checking revisions... [ 43.201490] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:16:08 testing simple program... [ 43.256605] cgroup: Unknown subsys name 'net' [ 43.314231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:16:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff810bd057 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006076 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015991b40 R15=ffff88806ce09a98 RIP=ffffffff8113062c RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f510c42f700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007efc389dbce0 CR3=000000000da64000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000003 RCX=0000000080000000 RDX=ffff88800c55d1c0 RSI=ffffffff83871a86 RDI=0000000000000005 RBP=ffff888008f67000 RSP=ffff8880143dfb10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888008f67080 R13=ffff88800fe63280 R14=0000000000000090 R15=0000000000000001 RIP=ffffffff814c0871 RFL=00000206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6858c89900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffee3b2e000 CR3=000000000c97c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000